However, unfortunately, the Table of contents may also be broken, and there may be other unforeseen breakage primarily in the handbook portion of the wiki.
Presently the 10.1 Table Of Contents is being "reconstructed" becoming incrementally fixed while the other handbook versions may have various breakage.
Writing an IMG File to Flash media
To write the USB IMG file to a Flash Card or USB pen drive you can do this with the Unix/Linux command dd:
dd if=<path_to/img_file.img> of=/dev/da0 bs=1m
Just substitute da0 with the device name of your USB stick.
NOTE: The USB images are FreeBSD-UFS formatted, and will not show up as a viewable file-system under Windows.
ADD SECTION ON how-to to flash a USB pen drive with the installer image. On Unix system this can be done with dd(1) and on Windows there's the  gui utility written by the M0n0wall crew.